My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 5KASMC22AHM3/9A
- Part No.:
- 5KASMC22AHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC22AHM3/9A.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,544
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
5KASMC22AHM3/9A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for high-energy surge clamping on power and signal lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 5000 W peak pulse power (10/1000 μs), 140.8 A peak pulse current (IPPM), and 35.5 V maximum clamping voltage (VC) - deployed to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial environments.
For engineers reviewing the 5KASMC22AHM3/9A datasheet, 5KASMC22AHM3/9A pinout, 5KASMC22AHM3/9A application, or 5KASMC22AHM3/9A equivalent, this page delivers verified electrical parameters, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, junction temperature capability up to +185 °C, and packaging configuration for tape-and-reel delivery (13" reel, 3500 pcs).
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 10/1000 μs waveform response enable precise clamping during inductive switching transients without reverse conduction leakage beyond 2 μA at VWM.
The device operates across –65 °C to +185 °C junction temperature range and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its DO-214AB package provides robust thermal performance (RθJM = 20.8 °C/W) and is halogen-free, RoHS-compliant, and AEC-Q101 qualified.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC bias margin for protected circuitry. |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - tight breakdown tolerance ensures predictable turn-on threshold under surge conditions. |
| VC @ IPPM | 35.5 V at 140.8 A - clamping voltage limits downstream voltage stress during 5000 W transient events. |
| PPPM (10×1000 μs) | 5000 W - peak surge energy handling capacity suitable for automotive load-dump and ISO 7637-2 pulse 5a compliance. |
| TJ max. | +185 °C - enables operation in under-hood automotive and high-ambient industrial environments without derating. |
| RθJA | 100 °C/W - thermal resistance with minimum recommended pad layout; informs PCB copper area requirements for thermal management. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling per AEC standard. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, cathode indicated by molded band. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102; meets JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (low-side connection) | Connected to ground or low-impedance return path; conducts during reverse-transient clamping. |
| Cathode | Reverse-biased terminal (high-side connection) | Connected to protected line (e.g., 24 V rail or sensor output); blocks normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term reliability and leakage stability at TJ = 150 °C (ID ≤ 20 μA). |
| Peak pulse power | 5000 W (10/1000 μs) supports protection against severe load-dump and lightning-induced surges in 24 V systems. |
| Clamping ratio (VC/VBR) | ~1.43 (35.5 V / 24.9 V avg) - low ratio minimizes voltage overshoot during fast-rising transients. |
| Response time | < 1.0 ps - intrinsic diode junction speed enables sub-nanosecond reaction to ESD and EFT events. |
| Mounting compatibility | DO-214AB footprint aligns with industry-standard SMCJ land pattern; supports automated placement and reflow. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) against ISO 7637-2 Pulse 5a load-dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤35.5 V, preventing damage to downstream PMICs and microcontrollers rated for 36 V absolute max. |
Use Scenario: Shielding analog outputs of pressure or temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at zero bias) TVS connected between signal line and ground near connector entry point. Use Value: Clamps ESD (IEC 61000-4-2 ±15 kV contact) and fast transients without distorting 4–20 mA or 0–10 V analog signals. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding 48 V PoE-powered equipment inputs from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression device upstream of hot-swap controller and input filter capacitor. Use Value: Absorbs 5000 W pulses while maintaining <2 μA leakage at 43 V nominal system voltage (derated variant used). |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drive). IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp flyback voltage during MOSFET turn-off. Use Value: Prevents MOSFET avalanche failure by limiting VDS spike to ≤35.5 V, enabling use of lower-voltage-rated 40 V switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5AT | Lower PPPM (400 W), smaller SMA package (DO-214AC), VBR = 24.4–26.9 V, VC = 35.5 V - same clamping but 12.5× lower surge rating. | Suitable only for low-energy ESD/EFT; not rated for automotive load-dump or industrial 5 kV surge testing. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4. |
| 5.0SMDJ22A | Same DO-214AB package, 5000 W rating, but higher VWM = 22 V, VBR = 24.4–26.9 V, VC = 35.5 V - identical clamping, different base P/N suffixing and reel packaging. | Functionally interchangeable in circuit; differs only in ordering code (HM3/9A vs. standard 5.0SMDJ series tape/reel configuration). | Choose when requiring Vishay's HM3 halogen-free, AEC-Q101-qualified variant with 13" reel logistics (3500 pcs). |
Compared with SMAJ22A-E3/5AT, 5KASMC22AHM3/9A delivers 12.5× higher surge immunity for mission-critical 24 V systems; versus 5.0SMDJ22A, it offers identical protection performance with certified halogen-free construction and traceable AEC-Q101 qualification documentation.
Availability
5KASMC22AHM3/9A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and telecom power input stages requiring stable component supply, AEC-Q101 compliance, and high-temperature operational continuity.
Supply support for 5KASMC22AHM3/9A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive qualification.
The 5KASMCxxA series was developed specifically for high-energy transient suppression in harsh-environment applications - targeting under-hood automotive, industrial motor drives, and infrastructure equipment where 185 °C junction operation and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the 5KASMC22AHM3/9A under full-rated surge current?
The 5KASMC22AHM3/9A exhibits a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM) of 140.8 A using the 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 89432 and represents the upper limit of voltage seen by protected circuitry during worst-case transient events. The 5KASMC22AHM3/9A maintains this clamping performance across its full operating temperature range up to +185 °C junction temperature.
Is the 5KASMC22AHM3/9A suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the 5KASMC22AHM3/9A is explicitly AEC-Q101 qualified per Vishay Document 89432, with validation covering high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. Its DO-214AB package, 185 °C maximum junction temperature, and halogen-free HM3 construction meet automotive under-hood requirements. The 5KASMC22AHM3/9A is approved for use in engine control modules, body electronics, and ADAS power supplies where sustained reliability under thermal stress is critical.
What does the "HM3/9A" suffix indicate in the 5KASMC22AHM3/9A part number?
The "HM3" suffix denotes Vishay's halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, including matte tin-plated leads and JESD 201 Class 2 whisker resistance. The "/9A" specifies the packaging format: 13-inch diameter plastic tape-and-reel with 3500 units per reel. This distinguishes it from variants like /57 (7-inch reel, 850 pcs) and ensures consistent logistics for high-volume SMT assembly. The 5KASMC22AHM3/9A is fully compatible with standard SMCJ footprint reflow profiles.
How does the thermal resistance of the 5KASMC22AHM3/9A affect PCB layout design?
The 5KASMC22AHM3/9A has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on Vishay's minimum recommended pad layout. To maintain TJ ≤ 185 °C under 6.5 W steady-state dissipation, designers must provide adequate copper area - typically ≥ 100 mm² of 2 oz. copper connected to both terminals. For higher ambient temperatures, increasing pad size or adding thermal vias improves RθJA toward the junction-to-mount value of 20.8 °C/W. The 5KASMC22AHM3/9A's thermal behavior is documented in Figures 5 and 6 of Document 89432.
Can the 5KASMC22AHM3/9A be used in bidirectional surge protection circuits?
No, the 5KASMC22AHM3/9A is strictly unidirectional, as confirmed in the Features section of Vishay Document 89432 ("Available in uni-directional polarity only"). It conducts only during reverse-bias overvoltage events and blocks forward current. For bidirectional protection (e.g., AC lines or differential data buses), a pair of 5KASMC22AHM3/9A devices in series-opposing configuration or a dedicated bidirectional TVS such as SMBJ22CA would be required. Using a single 5KASMC22AHM3/9A in bidirectional applications risks forward conduction and failure.
5KASMC22AHM3/9A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
5KASMC22AHM3/9A FAQ
1.How can I place an order for 5KASMC22AHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC22AHM3/9A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 5KASMC22AHM3/9A reliable?
The price and inventory of 5KASMC22AHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC22AHM3/9A is usually 5 days.
3.What payment methods are accepted for 5KASMC22AHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC22AHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC22AHM3/9A?
5KASMC22AHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC22AHM3/9A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 5KASMC22AHM3/9A?
For technical support, including 5KASMC22AHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC22AHM3/9A requirements.
6.How does Aetrix verify that 5KASMC22AHM3/9A is sourced from the original manufacturer or authorized distributors?
All 5KASMC22AHM3/9A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 5KASMC22AHM3/9A meets industry standards.
7.What is the process for return or replacement of 5KASMC22AHM3/9A?
All 5KASMC22AHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC22AHM3/9A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 5KASMC22AHM3/9A part is unused and in its original packaging.
Return procedure for 5KASMC22AHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC22AHM3/9A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
